42320726813 has 4 divisors (see below), whose sum is σ = 42952379520. Its totient is φ = 41689074108.

The previous prime is 42320726771. The next prime is 42320726821. The reversal of 42320726813 is 31862702324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42320726813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42320726113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315826253 + ... + 315826386.

It is an arithmetic number, because the mean of its divisors is an integer number (10738094880).

Almost surely, 2^42320726813 is an apocalyptic number.

It is an amenable number.

42320726813 is a deficient number, since it is larger than the sum of its proper divisors (631652707).

42320726813 is an equidigital number, since it uses as much as digits as its factorization.

42320726813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631652706.

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 42320726813 in words is "forty-two billion, three hundred twenty million, seven hundred twenty-six thousand, eight hundred thirteen".